Shield for electrical apparatus



1,471,183 A. G. MILLER S-HIELD FOR ELECTRICAL APPARATUS Filed May 22, 1920 2 Sheets-Sheet l Get. 16 1923.

' 1,471,183 A. G. MILLER SHIELD FOR ELECTRICAL APPARATUS Filed May 22,1920 2 Sheets-Sheet 2 may - in two independently supported sectionsof Patented ct; 1 6 1 g UfEITED QS Anni-ire. M LLER, or rrIILAnELPHrA; rEnNsYLvAn a ssIGNoR ToLANKEnAd VANIA.

' 'A ppli eation iiiea m, 7

To all whom it may concern:

7 Be itknovvn that I, ALBERT G, Mrmn hla citizen of the United States, residing Philadelphia, Pennsylvania, have invented Shields for Electrical Apparatus, of which the following is a specification,

One object of this invention is to ientform of shield for-use in connection with high tension I electrical appjaratusjand more -,.particularly X-ray apparatusyfQ Dreventi'ng accidental contact with the" na ls of current carrying; conductors. "asso he I ciated: therewith; theinvention': especially contemplating-the provision, of, an insulat- 1 'ing protective easing ,made;;in se"mb1y connected parts designedftopermittree ac;

cess to the enclosed apparatuswhen thisisf desirable o'r necessary. F l o Another object of my invention is tooprovide a durable form ofprotective insulating casing consisting of adjustablyj connected sections supported to permit of their'con-j ven ent separation, together WithQno el means for insur ng the assembly and retention of said sections in their normal proteci so tive positions. i g V o a 'These objects and other-advantageous ends I attain as hereinafter set forth, reference :being had to the accompanying drawingsfln w Figs. land 2 are'respectively a side eleva: tion and a-planof ashield or casing constructed in accordance with 'myfinventio'n Fig, 3 is a horizontal section on the line Fig.4 is a Vertical section on the line 1K,

Fig. #51 is a perspective :viewfof one of the sections of the protective casing. Y i

the abovedrayvings 1 represents apoig tion of thest'and or" latforni carrying an I -X -rayjtube With its associated apparatus which in the presentinstance includes terminals 2 and 3connectedto h1gh tens on current conductors (not shown). For mechanically protectingjthetube and especially for preventing accidental contact with these terminals or with the conductors adjacent" thereto, I provide anelongated casing made form 1 a pair of parallel blocks 4;, and pivot:

SHIELD lionntno'rarcnnnrrnrmrusl downwardl y from opposite. sides of a fiat platefi of 1nsulatmg--'material' constituting the floor or' bottom'of one of the section's p o my shield.

g Eaclilofsaid .-sections;consists ota r V V n provide P a relatively simple, substantial" and conventhe X-raytube j'andjsupporti'ng a side secto each of a jof lugs'5 projecting suitably cutout to approximately-fitjarouiid r tionfl7 in the form are sheet of insulating f material so bent at its middle that 'itsftwo, parts extend at an acute angle to each-other.

Qn the'up' ee edgeot each ofi'these side sec; 1' I tlons is mounted a substantially triangular t v relatively heavierinsulatingFina; '5 7 g g 77 substantially jtriangularfpris-q" I matic CHSlIlgiQSGCtlOIIS,Bach made'up of the 1 sections 6,Tai'1 d'8,1aredesigned to'have their base portions in engagement and forjthe purpose of separablyliolding 'thern tolgether, 1 i

l mountonftheir adjacent upper portions some form of; conveniently operative latch or holding device such as the't'runkfastener illustrated. This consists of' a plate 9; ifastened to onevof the side'sections 7 having a projecting lug '10' designed to be engaged bya Ushaped spring actuated hasp 11 carriediby a the othler'side section, v I

For T insuring that i I the vertical meeting edges of the two} casing sections *6, 7 and 8y i are n lateral as 'Well as in vertical registry, iv I'formone; ofthem with a. series of pro- 1 I 1 o jecting portions "13 in the form of corrugati'ons designed to fit into corresponding Irecesses in thef othersection and as; shown in Fig. 5;, n1ake the-meeting edges of' the' tWO sections i respect vely overlap each prevent th'elr lateral displacement.-

fother to In order to permittlie userotthe device plate 1201 the adjacent edge of t0 as er itinitlie condition 01 operatic fth I i v apparatus Withini the" ca sing',I- provide in side of each section For this purpose I each of theside membersia seriesofwin I dows, 1n the present instancetwo in each 1 Orni the necessary: o es in the insulating material of Which the side sections. are r formed and over these place sheets 1401f transparent material such asmica, retaining them in place b coversheets 1 5 ofrelativly thin insulating material. Thile the casing sections may be'made of anylsuitable. non

conducting substance, I have found vulcans i zed; fibre in sheet form to satisfactorilyf fulfill the required conditions,

V at

V When it is desired to open the casing, the catches are swung back from "the lugs whereupon the two casing sections are permittedtoswing apart on their pivotscrews 16" from the horiz'ontal positions shownin full lines in Fig; 1 tofthe verticalpositions illustrated in dotted lines. This exposes the X-ray tubeand its terminals, permitting any desired adjustments or alterations. .to. be made, When however the sections areswung iromtheir dependihg parallel positions into I that it ;is a practical impossibility for any 7 7 their horizontally"aligned ositions, they completely surroundfthe X r'ay tube and while the'floor or bottom sections 6 are cut out to permitthe. passage ofthe necessary tube supportingstructures, etc.,it is noted (mew accidentally touchthefterminals 2 and 3 or'to approach within a dangerous proxiniityof the tubelflj I V I 1Itlis.tobeinoted'thatlthe supporting 'struc; tures lj'jandtheirgcoacting lugs or blocks 5 are; l Q it i l rel tively toi thef'casing 7' that the two sections of the latter tendto swing apartundeir the action of 'glaVifiyabl t are restrained froln' so doing by thecatches tates the opening of the casingjandfldoes notc materially affect the convenience of bring- 3o 11 Such anarrangement naturally facili- 2. The combination of a supporting struc:

turehaving two pairs of lugs; a casingmade' i, in two separable partseach having pivotal connection with one pairof the lugs and means for normally holding said v sections together toform a protective shield for electrical apparatus.

f The combination of a casing of insulating material made in two separable sections having registering openings constituting an aperture; pivotalsupporting means engaging the lower portions of said sections to permit them swinging down andapart; and means for detachably connecting the sections in position to form a protective shield.

,4. The combination in a protective casing for electrical apparatus of two separable sections each consisting of a top frame member, a bottom member, and side portions rigidly connecting said members; means ,for pivotally supporting said sections independently ofeach other to permit of their swing-' ing part; and means forjno'rmally holding casing. V r a c 5; The combination in a: protectivecasing for electrical apparatus ofitwdsep'a'rable sections; means: for'r independently pivotally the sections together to'define'aprotective mounti'ng's'aid separable sections iormotion in a common plane ;i-ineans for, lateral y and vertically valigningsaid sections and means for normally retaining the sections in their closed positionsito define aprot'e'cti've Shield 6. The combination of a casing'of insu lating material made in'two sections having independent pivotal mountings, whereby the sections may swin'g' toward and away from each other, said sections also havingcomplementary co-acting side 'edge'szformed to align e s c ion vertically as well 91%. erallyff I 7. The combination in a protective casing for electrical apparatus "ottwoseparable sections; pivotal supporting means for said sections positioned to cause them to separate and swing down and apart underthe action of gravity with 'catchesfor normally hold in'g'the two sidesof the sections together in the form of a protective shield. a

8. In a protective casing for X'-ray apparatus, the combinatio'n with a pair'of housings having open top endportio'nsyof means for I pivotally mountlnpg 7 said sections in such manner that theopen end portions thereof are contiguous, forming a: chamber open at the top, the pivotal mountings further being such vthat said sections 'tend'to separate under the action of gravity, and

tiguous positions. a y 'ALBERT MILLER;

means forsecuring the csections in their con- 

